需求：使用uniapp开发的安卓软件需要调用非官方的安卓设备摄像头进行拍照
实现：使用uniapp的live-pusher
代码:
<button class="button1" @click="catchPhoto()">
<span style="color: #fff;">拍照</span>
</button>
catchPhoto() {
this.$Router.push({path:'/pages/camera/camera'})
},
//设置图片
setImage(e) {
console.log(e);
//显示在页面
//this.imagesrc = e.path;
this.savePhoto(e.path);
this.chooseAndUploadImage(e.path)
},
//保存图片到相册，方便核查
savePhoto(path){
this.imagesrc = path;
//保存到相册
uni.saveImageToPhotosAlbum({
filePath: path,
success: () => {
uni.showToast({
title: this.imagesrc,
duration: 2000
});
}
});
},
chooseAndUploadImage() {
// 调用uni.uploadFile将文件上传至服务器
const that=this
uni.uploadFile({
url:'https://scalpsentry-release.siyuhome.net/sys/common/upload', // 设置上传接口地址
filePath: e.tempFiles[0].path, // 需要上传的文件路径
name: 'file', // 后台接收文件时对应的字段名称
header: {
// "Content-Type": "multipart/form-data",
},
success(response) {
// TODO: 处理上传成功后的操作
console.log('文件上传成功');
console.log(response);
const data = JSON.parse(response.data)
return
},
fail(error) {
console.log('文件上传失败');
console.log(error);
// TODO: 处理上传失败后的操作
}
});
},
新建/pages/camera/camera.nvue文件
代码如下：
<template>
<view class="live-camera" :style="{ width: windowWidth, height: windowHeight }">
<live-pusher
id="livePusher"
ref="livePusher"
class="livePusher"
mode="FHD"
beauty="0"
whiteness="0"
:aspect="aspect"
min-bitrate="1000"
audio-quality="16KHz"
device-position="back"
:auto-focus="true"
:muted="true"
:enable-camera="true"
:enable-mic="false"
:zoom="false"
@statechange="statechange"
:style="{ width: windowWidth, height: windowHeight }"
></live-pusher>
<view class="menu">
<!--底部菜单区域背景-->
<cover-image class="menu-mask" src="/static/live-camera/bar.png"></cover-image>
<!--返回键-->
<cover-image class="menu-back" @tap="back" src="/static/live-camera/back.png"></cover-image>
<!--快门键-->
<cover-image class="menu-snapshot" @tap="snapshot" src="/static/live-camera/shutter.png"></cover-image>
<!--反转键-->
<cover-image class="menu-flip" @tap="flip" src="/static/live-camera/flip.png"></cover-image>
</view>
</view>
</template>
<script>
let _this = null;
export default {
data() {
return {
poenCarmeInterval:null,//打开相机的轮询
aspect: '2:3', //比例
windowWidth: '', //屏幕可用宽度
windowHeight: '', //屏幕可用高度
camerastate: false, //相机准备好了
livePusher: null, //流视频对象
snapshotsrc: null //快照
};
},
onLoad(e) {
_this = this;
this.initCamera();
},
onReady() {
this.livePusher = uni.createLivePusherContext('livePusher', this);
this.startPreview(); //开启预览并设置摄像头
this.poenCarme();
},
methods: {
//轮询打开
poenCarme(){
//#ifdef APP-PLUS
if (plus.os.name == 'Android') {
this.poenCarmeInterval = setInterval(function() {
console.log(_this.camerastate);
if (!_this.camerastate) _this.startPreview();
}, 2500);
}
//#endif
},
//初始化相机
initCamera() {
uni.getSystemInfo({
success: function(res) {
_this.windowWidth = res.windowWidth;
_this.windowHeight = res.windowHeight;
let zcs = _this.aliquot(_this.windowWidth,_this.windowHeight);
_this.aspect = (_this.windowWidth/zcs)+':'+(_this.windowHeight/zcs);
console.log('画面比例：'+_this.aspect);
}
});
},
//整除数计算
aliquot(x, y) {
if (x % y == 0) return y;
return this.aliquot(y, x % y);
},
//开始预览
startPreview() {
this.livePusher.startPreview({
success: a => {
console.log(a)
}
});
},
//停止预览
stopPreview() {
this.livePusher.stopPreview({
success: a => {
_this.camerastate = false; //标记相机未启动
}
});
},
//状态
statechange(e) {
//状态改变
console.log(e);
if (e.detail.code == 1007) {
_this.camerastate = true;
} else if (e.detail.code == -1301) {
_this.camerastate = false;
}
},
//返回
back() {
uni.navigateBack();
},
//抓拍
snapshot() {
//震动
uni.vibrateShort({
success: function () {
console.log('success');
}
});
//拍照
this.livePusher.snapshot({
success: e => {
_this.snapshotsrc = e.message.tempImagePath;
_this.stopPreview();
_this.setImage();
uni.navigateBack();
}
});
},
//反转
flip() {
this.livePusher.switchCamera();
},
//设置
setImage() {
let pages = getCurrentPages();
let prevPage = pages[pages.length - 2]; //上一个页面
//直接调用上一个页面的setImage()方法，把数据存到上一个页面中去
prevPage.$vm.setImage({ path: _this.snapshotsrc });
}
}
};
</script>
<style lang="scss">
.live-camera {
justify-content: center;
align-items: center;
.menu {
position: absolute;
left: 0;
bottom: 0;
width: 750rpx;
height: 180rpx;
z-index: 98;
align-items: center;
justify-content: center;
.menu-mask {
position: absolute;
left: 0;
bottom: 0;
width: 750rpx;
height: 180rpx;
z-index: 98;
}
.menu-back {
position: absolute;
left: 30rpx;
bottom: 50rpx;
width: 80rpx;
height: 80rpx;
z-index: 99;
align-items: center;
justify-content: center;
}
.menu-snapshot {
width: 130rpx;
height: 130rpx;
z-index: 99;
}
.menu-flip {
position: absolute;
right: 30rpx;
bottom: 50rpx;
width: 80rpx;
height: 80rpx;
z-index: 99;
align-items: center;
justify-content: center;
}
}
}
</style>
